6 КЛАСС №826 Найдите корни уравнений. 1)1,2d-0,5(4d-1)= -0,7(d-2) 2)3,1(1-3t)+t=0,4(t-14)

1)1,2d-0,5(4d-1)= -0,7(d-2)1,2d-0.5*4d-0.5*(-1)=-0.7*d-0.7*(-2)1.2d-2d+0.5=-0.7d+1.41.2d-2d+0.7d=1.4-0.5-0.1d=0.9d=0.9:(-0.1)d=-92)3,1(1-3t)+t=0,4(t-14)3.1*1-3.1*3t+t=0.4*t-0.4*143.1-9.3t+t=0.4t-5.6-9.3t+t-0.4t=-5.6-3.1-8.7t=-8.7t=-8.7:(-8.7)t=1